Multispeed motor head unit



March 13, 1951 R. H. MORGAN 2,545,040

MULTISPEED MOTOR HEAD UNIT Filed July 20, 1949 M INVENTOR.

fatented Mar. 13, 1951 'naiph "H. iijrigjaii, "Indianapolis, 1nd., assignent charles Drexler on., nie., indianapolis, ina.,

#Application-July 20, 1949, 'ser'iiifd 1051?99 This invention rela-tes to a uni-directionaliual speed -drive head structure for Aa motor. If the motor -be 'of reversible type, obviously the dual speed control is effective ineither direction of 'motor rotation.

The chief object di the present invention is to provide a motor drivecontrolof power takeoif type that selectively provides one of two speeds by the vrmere shifting 'of control members and without requiring belts, etc., ortlfeusu'al change speed sets of gears.

The lchief feature of `the present invention resides in the separation of a motor drive'shaft and inclusion in a motor-head of a geariiutch structure -for selectivevspeed connection bf the separated shafts (andseparation thereof if desired) and by manual meansrdisposed "within and projecting iutwaidly y"from vthe exposed and driving "end of the shaft.

Other objects and features ofthe invention will be set forth more fully hereinafter.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawings Fig. 1 is a longitudinal central sectional view through the multi-part motor shaft and its associated parts and motor end or head, the major portion of the motor being omitted, and such part as is shown being illustrated in elevation, parts being shown in one speed position.

Fig. 2 is a similar View of the critical parts in a second speed position.

Fig. 3 is an end view of the motor end or head.

In Fig. 1, lli indicates generally the major portion of an electric motor having a rotor shaft and having a Ventilating fan I2r press tted or otherwise secured to it for motor ventilation purposes. The motor shaft is reduced at the end I3, and keyway |3a takes key |4a whereby the shaft end is secured to sleeve shaft portion I4.

A plate-like closure I1 for the motor casing includes bore IIa in which is mounted anti-friction support I6 that rotatably supports the sleeve shaft I4 which projects through said bore. This plate has tubular extension I8 thereon. The sleeve shaft is elongated and is enlarged as at 20 within the extension and beyond the same. Lubricant seal I9 between the two last mentioned portions and seal |5 between the race I6 and said sleeve prevent lubricant escape from the selective drive to the rotor and stator portions of the motor.

Partition plate I1 includes outer tubular extension 28 with ange 28a, and a central internal .2 n bearing 'portion '281). A *conical 'end closure V23 has Va complementary 'anchoring 'f'ange 26a and 'cupi-like end ZSb'wi'th central aperture '29. This vcup bearing'mounts:tlfeantiifriction race 25.

VTubular 'drive'shaft v3| e'iitends through aperV 'ture 2S and 'is lubricant sealedY as -at 30. A vfilling plug 9"and ventplu'g`2'1 may beincluded in portions `28 and 26 'as illustrated. yTubular member "23"wthin the chamber `'forr'netl by Asaid :portions "at one end "peripheraliyenvelopes :extension I8 'as shown and lat itsfotherend it sfr'educed and 'supported within `said "race 25.

The tubular drive `shaftf3| extendsinto tubular member 23 "and is enlarged vat 3 I a therein. The 'enclosed end "of the s'lfaft 'is' reduced -and is 'nested within the-'enlarged sleeveportion 2B and lrotatably supported "therebyiijs fthe roller bearing 12 Ga.

iSleev'e 20 iifcludeseiiternal gear portion 12|. Meshing therewith are pinions 22 which mesh with Ting gear l3"3 upon Athe 'tu'bular portion 32 'f y'casing '2`6 :and nested 'within ftblar portion 28. Note the gear teeth 2| are longitudinally extended.

Pinions 22 are anti-frictionally supported at 22a by pins 22h carried by sleeve 23, the latter being suitably enlarged and slotted as at 23a and 23h respectively. Thus sleeve 23 is rotated in the same direction as sleeve 20 but at a much slower rate. The other end of said sleeve 23 is spline connected to sleeve 35 which includes teeth 35a. Bearing 36 is interposed between the sleeve 35 and shaft 3| as shown.

Shaft 3|, as thus described, is free of either sleeve 20, gear teeth 2|, or sleeve 35, gear teeth 35a. Disposed in the tubularity 38 of drive shaft 3| is a cylindrical control member 4B terminating in a spherical handle 4|.

'I'he exterior of shaft 3| enlargement 42 is toothed as at 43. Extending diametrically through said enlargement is the axially elongated radial bore 44. A pin 45 in said bore secures shifter member 4B to clutch collar 4S having internal teeth 4T`sliding longitudinally upon teeth 43.

When the ball is pushed in, see Fig. 1, clutch collar 46 clutches planetary gear 2i! to drive shaft 3| and the drive is direct or the ratio is 1 to 1. When the ball is pulled out the clutch collar 46 clutches the sleeve 35 to shaft 3|. Hence the drive is indirect and in a different ratio.

The length of slot 44 is such, compared to the width of clutch collar 46, that when the ball 4| is intermediately positioned shaft 3| is not driven by shaft I. Near each end of shaft 40 is a friction ring 48 and 49. When one is in or com- 3 pressed, the other is out or released, compare Figs. 1 and 2. The inner end 50 of tubularity 38 of shaft 3| permits of such movement and ac= tion.L

Thus the control member M is singly held in either clutching position and multiple held in neutral position.

While the invention has been illustrated and described in great detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character.

The several modifications described herein as well as others which will readily suggest themselves to persons skilled in this art, all are considered to be within the broad scope of the invention, reference being had to the appended claims.

The invention claimed is:

1. In combination with an electric motor hav- :ing shaft means projecting therefrom, the pro- -jecting end thereofbeing tubular and externally vhaving planetary sun gear teeth thereon, planetary pinions meshing with said sun gear teeth, a sleeve carrier 'for the pinions, a housing for the sleeve carrier, means within said housing supporting the opposite ends of said sleeve carrier, .a ring gear rigid with said housing and With which the pinions mesh, said housing being rigid with the motor, a tubular drive shaft disposed within the housing and projecting therefrom, a longitudinally movable control member projecting beyond the housing exposed end of the drive shaft for selective speed control thereof, the drive .shaft having splines thereon axially spaced from the sun gear teeth, toothed clutch means having the teeth thereof slidingly engaging the splines of the drive shaft and shiftable by said control member, into engagement with the sun gear teeth.

2. In combination arotatable shaft means having externally disposed teeth at one end there- 4 of and forming a sun gun, planetary pinions meshing therewith, a stationary ring gear for said pinions, the sun gear teeth being elongated beyond the pinion, a sleeve type carrier means for fsaid pinions and having teeth thereon, a tubular shaft disposed Within one of said means and operatively supported by the other of said means, a clutch member slidable longitudinally upon said shaft'and non-rotative relative thereto and adapted for selective engagement with the sun gear teeth elongations and the carrier teeth, and means within said tubular shaft for selective positioning of said clutch member.

3. YStructure as defined by claim 2 wherein the tubular shaft includes a longitudinally elongated radial slot and a radially disposed pin therein secured at opposite ends to said last mentioned means and the clutch member.

fl.V Structure as defined by claim 2 wherein the last mentioned means comprises a rigid member longitudinally movable relative to said tubular shaft, the latter including a longitudinally elongated diametral slot, and a pin extending through said rigid member and at opposite ends being rigid with the clutch member.

' RALPH H. MORGAN.

REFERENCES CITED *The following references are of record in the 

